A game library which enables cross-platform game development in Java, with support for Android development and desktop development. It makes use of OpenGL for portability.

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LibGDX, BitmapFont strange position behavior

I'm using a Stage of LibGDX to draw a text, in my case the FPS. But after resizing, the position of the text does not behave properly. As you can see in the attached gif: The resizing function ...
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1answer
7 views

ClickListener getTapCount() returns 0

I want to detect the double tap on a Container. If it is detected, then i have to remove the Actor associated with it. This is my first attempt: addListener(new ClickListener() { ...
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1answer
12 views

Multiple input not working properly

I have 3 different buttons, one for each action. I want to be able to jump and walk at the same time, but there's a little problem. jumpButton doesn't work while I'm pressing leftButton or rightButton ...
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1answer
12 views

libgdx - Check if body is touch

I have some bodies around the screen(Ball[] balls), and I would like to delete them when user touches them. Also, I have an Image as userData of the bodies. I dont want to make a function to all ...
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1answer
57 views

LibGdx Scalling sprites on Android

I have a sprite that is a few buttons but need them in the center of the screen for all android devices. I tried setting it's location to the center of the screen by dividing the orthogonal camera by ...
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1answer
17 views

In Scene2D, does Actor.hasActions() no longer exist?

Eclipse does not allow me to do while (actor.hasActions()){} saying it's undefined for type actor, but the libgdx API still has it as one of an Actor object functions.
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1answer
23 views

Sounds overlapping when playing too many at the same time

I am pretty novice when it comes to game sound management, so excuse my ignorance. I am having an issue when playing too many sounds at the same time where some sounds stop playing, or doesn't play ...
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1answer
417 views

libgdx ActorGestureListener.pan() parameters not moving actor in smooth line

I override the pan method in ActorGestureListener to implement dragging actors in libgdx (scene2d). When I move individual pieces on a board they move smoothly, but when moving the whole board, the ...
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1answer
70 views

LibGDX make an object rotate around something

I need to rotate and object, which should be a circle made up with a ShaderRender, around a specified point. In LibGDX there is a method or something which allow me to do this? If it doesn't exist how ...
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1answer
95 views

Libgdx understanding screen size

I'm trying to create my own jumper type game where the player moves up through an infinite y value. The problem I am having is getting the screen size to match up with the android screen. viewport ...
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2answers
69 views

How to make sure that when two bodies collide, there is only one collision detection on box2d?

I'm using LibGDX with box2d, and when to bodies collide collision is detected multiple times. here's the code `public void preSolve(Contact contact, Manifold oldManifold) { Body a = ...
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1answer
10 views

LibGDX buttons bounds are wrong

I am making a simple gui in libgdx and run into this problem ; when you click on the button it's bounds (?) are wrong since if I click under it, the game registers it as a click. On the other end, ...
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Design the game Stage in libgdx

Let's assume my Stage has this structure: A Table with cells (like a matrix) centered in the screen Each cell of this Table has an Actor associated to it I have to add actors also in the remaining ...
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2answers
69 views

How to make sprite move in any direction?

I have an arrow sprite that rotates based on where my cursor is pointed, I can only make it move up,down,left and right.How about in a diagonal way? //this is the rotation nt x=Gdx.input.getX(); ...
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1answer
77 views

2D - Smooth lighting with shadows for a tile-based game

for the last week or so I have been completely stuck on trying to implement efficient lighting. I've been researching and experimenting and I've looked everywhere that I have been capable of finding, ...
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1answer
158 views

How do I make my main character move towards an object? LibGDX/Java

What I want to happen is for my player to bounce from spring to another. For example take the illustration below: Here's my code (what I've tried to do so far). This gets called in an ...
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1answer
63 views

How to achieve sprite reflection effect in libgdx

I am currently working on an open world game similar to Pokemon using libgdx. I am currently stuck on this effect that I really want to be done before moving to other features of my game. How can I ...
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2answers
872 views

Matrix rotation wrong orientation LibGDX

I'm having a problem with matrix rotation in libgdx. I rotate it using the method matrix.rotate(Vector3 axis, float angle) but the rotation happens in the model orientation and I need it happens in ...
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1answer
474 views

LibGDX - Box2D: Realistic Light and Layers

I'm having some problems with my current game. Short description: It's a 2D game where you have to avoid the lights or you lose HP. My problem is the following one: Here is the rendering process: ...
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2answers
326 views

Basic 2d platform collision detection algorithm has a slight bug (Java)

I'm trying to implement collision detection between Player (the main character) and a Platform. They are both modelled as rectangles; when player hits the side of a platform he should bounce off it ...
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2answers
107 views

Game lags when my player collides with a specific object (solution known, unsure how to implement)

I'm developing a game in Android using LibGDX (although this is more of a JAVA problem than an engine problem). My aim is to have my player bounce off one spring onto another that will eventually take ...
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2answers
27 views

How can I add extensions to libGDX

I had a problem with my Font in a game I am developing in libGdx. After some googling I was instructed to use the following code: private void createFonts() { FileHandle fontFile = ...
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0answers
20 views

balloon ligher than air with libgdx, impementation of FixtureDef.density, gravityScale, linearDamping?

I use libGdx/box2d's physic. My intention is to create a balloon filled with helium (a body, what hovers above a surface, if we apply a little force to it - it moves fast but not far, if we push ...
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2answers
136 views

Libgdx: different speed on different devices

I am running a simple Libgdx app that I have wrote, on my Android phone and Android tablet and I am getting the unexpected result of having different velocities when a body is moved. To move the body ...
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2answers
95 views

LibGDX particle emitter rotation

I have a libGDX game, in which I'd like to make some ice breath like effect using particles. So far we made a cone like effect. I can obtain and render it on the screen with this. ...
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2answers
450 views

LibGDX , Scale button with animation when it is pressed

I am developing game using LibGDX . I want to create beautiful menu and to scale buttons when they are pressed but not in this way , when it is pressed scale it 1.5f , I want to scale it with ...
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1answer
25 views

How do I query a LibGDX Box2DLights “light” and “dark” regions?

I have lighting implemented using Box2dLight. I want to update/render things inside the player's PointLight area. Stuff in the dark area should not be rendered. How can I find which areas are lit or ...
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2answers
332 views

Card game - creating card Listener

I am making a card game where there are 21 cards on hand and 2 options from where user can draw cards to his hand and throw a card from hand. I am new on game development and I'm following the ...
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1answer
26 views

Scene2D: How to use Image.setDrawable()

I'm trying to change the texture of an Image actor on my Scene2D stage, however I can't seem to get it working. It seems like setDrawable() doesn't really do anything. For example, this will make ...
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1answer
923 views

Libgdx actor bounds are wrong

The Actor's boundaries are not centered at the ButtonText but I used the setBounds() method. The higher the Y position is, the less centered is the boundary. The weird thing is that i only created ...
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1answer
347 views

Word game - board implementation?

I'm working on a boggle type game for android, using libgdx. The user is presented with a 4x4 grid of letters and must find words by dragging their finger over the letters. Unlike boggle I want used ...
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2answers
59 views

LibGdx TextField - Hide Keyboard when not focused - How to?

I'm creating a registration screen for my game. I implemented textfields and input is getting correctly. But when I click elsewhere after text is entered, the keyboard stays visible and does not hide ...
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1answer
406 views

Changing Box2D Body from Kinematic to Dynamic after contact

What is the correct way to change a Kinematic body into a dynamic body? context - I have a dynamic body as a projectile which has to be fired at a kinematic body (it is kinematic because i am ...
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2answers
55 views

Libgdx inputlistener scrolled is not working

I am currently using libgdx. Below codes are added to a stage. this.addListener(new InputListener() { public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) { ...
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1answer
42 views

2D Collision Response

I am trying to implement collision response in my libgdx game. I'm using Rectangle objects as my bounbing boxes. This makes collision detection very easy, however I can't quite get the response ...
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1answer
14 views

libGDX sprite image not updating Event Handling InputHandler

I created a separate inputHandler class implementing InputProcessor. I'm using Event Handling (libgdx github page: https://github.com/libgdx/libgdx/wiki/Event-handling) public class inputHandler ...
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1answer
18 views

How to scale LibGdx TextButton?

Apparently textButton.setScale() is not working. Even when the scale is set to 0.1, the button is displayed in it's original size. How to properly scale a TextButton in LibGdx? The official ...
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1answer
37 views

Playing with hashmap in drawing

I'm developing a game in Java for Android, using LibGDX. In my render(), between the batch.begin() and batch.end() I'm running through all the game objects and draw them. Every game object is stored ...
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1answer
55 views

How can I update a Stage-based HUD from another Stage's Actor in libGDX?

I feel like this is a simple problem, but I'm having issues finding the correct search terms. I have a Screen that includes two Stages. The first, stage, contains a number of objects deriving from ...
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1answer
28 views

libgdx continuous movement while touch and hold (even after jump)?

So, I have these buttons where I have implemented a method to handle 'touch and hold' (without polling). If the player touches and holds the walk button ..it will keep walking till the button is ...
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1answer
97 views

Scene2d Stage Actor setup issues

I am creating a game using libgdx. In the same each level has a class. I have stage as a member variable of the class. To this stage, I add actors. Inside the levels class, I have attaced the input ...
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1answer
42 views

LibGDX - Show a minimap

I've started to develop a small roguelike game in LibGDX. I've also made a minimap class, which creates and updates the minimap as the player explores the dungeon, by using a Pixmap. The minimap class ...
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2answers
5k views

Problem to match font size to the screen resolution in libgdx

I'm having problems to show text on my game at same size on different screens, and I did a simple test. This test consists to show a text fitting at the screen, I want the text has the same size ...
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2answers
67 views

How can check a collision between 2 non-axis aligned boxes?

I'm making a simple and easy game and I need to detect the collision between 2 boxes. It only needs to return trueor false, no physics involved. I started working and couldn't find an algorithm that ...
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2answers
156 views

libgdx texture edge blending problem

I have two completely white bitmaps here: They're there, trust me. When I put one on top of the other and scale them down with TextureFilter.Linear I get this: How do I get rid of the dark ...
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1answer
36 views

LibGDX - how to detect touchUp with GestureListener?

I'm making a game and I have implemented GestureListener as my inputprocessor. It came with a bunch of methods such as fling, pan, tap etc etc including touchDown. However, there is no touchUp method! ...
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1answer
121 views

LibGDX Box2D Lights - Illuminate background

I have a box2D world made of tiles. I use a custom DirectionalLight for light up the scene from above (It shines through transparent blocks [eg.: the water] more deeply). The problem is (as expected), ...
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16 views

Design a grid with draggable Actors

A quick overview about what i want to do. I want to make a grid 5x5 centered in the screen in which each cell can contain an Actor that can be moved in another cell. An Actor can be of any type, ...
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1answer
35 views

How can I add a transparent overlay to a UI in libGDX?

I am attempting to use the following code shapeRenderer.begin(ShapeRenderer.ShapeType.Filled); shapeRenderer.setColor(3,3,3,.3f); shapeRenderer.rect(0,0,gameWidth,gameHeight); ...
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1answer
23 views

LibGDX viewport touch coordinates transformation

I've been trying to get LibGDX's viewport and camera unproject() to work and so far none of the tutorials/answers I've found have worked for me. I have a game window of 840x480 units with ...